for $50k I could make something in my back yard that would cover the bases an probably be alot more comfortable and at least I would know that it's build and ready and that I wouldnt be banging on the door begging to get in cause I've been shut out. Another thing is people will know where it is and they will try to get in any way possible and depending on where it's located might just be impossible to get to. Add in the fact that people will want to suddenly be able to bring aunt ruth and cousin bob cause they were visiting and you've got a cluster---- in the making. Watch the Twilight Zone episode The Shelter and imagine it 1000x's over with people with guns who's got nothing to loose. Also if nothing happens I can use the shelter in my back yard for a root cellar and game room and storage which is kinda hard to do with a place far from home and probably wont be opened till doomsday.